Configure Transformer Ratio - Pacific UPC-32 Operation Manual

SECTION 3 INSTALLATION

3.4.1 CONFIGURE TRANSFORMER RATIO

NOTE: Most users will not need to concern themselves with the unit configuration as it is set at the
factory if the UPC is packaged with a power source.
Set the TRANSFORMER RATIO of the UPC to be the same as the turns ratio of the Output XFMR in the
Power Source. Refer to the Power Source Manual to determine the TRANSFORMER RATIO of the
Power Source. The ratio is set by the TRANSFORMER RATIO SWITCH on the UPC METERING PCB.
See figure 3.4.1. The Dip-switches S2-8 and S1-1 thru S1-8 are binary weighted:
RATIO
S1-8
WEIGHTING 2.56
VALUE
NO XFMR * OFF
0.50 OFF
1.00 OFF
1.50 OFF
2.00 OFF
2.50 OFF
5.11 ON
* Set all bits to OFF to indicate NO TRANSFORMER installed.
NOTE: TRANSFORMER RATIOs are implied as a ratio to one, e.g., a setting of 2.5 is implied as a ratio
of 2.5:1.
DIP-SWITCH SETTING
S1-7 S1-6 S1-5
1.28 .64 .32
OFF OFF OFF
OFF OFF ON
OFF ON ON
ON OFF OFF
ON ON OFF
ON ON ON
ON ON ON
24
S1-4 S1-3 S1-2
.16 .08 .04
OFF OFF OFF
ON OFF OFF
OFF OFF ON
ON OFF ON
OFF ON OFF
ON ON OFF
ON ON ON
S1-1 S2-8
.02 .01
OFF OFF
ON OFF
OFF OFF
ON OFF
OFF OFF
ON OFF
ON ON